Restless Legs!!

Breia • 24. Married. 3 blessings all under 6.

Need some advice or tips from anyone that is currently or has previously experienced this.. I’m 27w 4d and at night when I lay in bed after about 10 min my hips and legs feels so heavy like I need to move them, I toss and turn from side to side and stretch them out and that is not helping. I haven’t slept in like 4 nights because from waist down is restless 😭 is this caused by a deficiency of some sort or just another fun pregnancy symptom??